Carr, RM; Blumenthal, UJ; Mara, DD; (2004) Guidelines for the safe use of wastewater in agriculture: revisiting WHO guidelines. Water science and technology, 50 (2). pp. 31-38. ISSN 0273-1223 https://researchonline.lshtm.ac.uk/id/eprint/6149 Full text not available from this repository.